When I get over 60 I get some vibes??? The BL should not casue that right. More than likey the tires is what I was thinking I took them down and had them rebalanced. Everything checked out fine. Dealer says they need to wear down a bit before they smoothen out. I have about 800 miles on the new tires. Could this be in fact the tires and not something out of whack.

The BL won't cause the vibes but the suspension lift will. You can do a MML or a Tcase drop to get rid of them. As per the tires, I have heard that swampers dont balance well, but I don't think thats your issue.

It could be drive shaft vibration but I would suspect the tires are the problem. If you have access to another set of tires you could swap them out and see what happens. You could swap your front and rear tires. Tire problems are usually felt more in the front than the rear. You could also remove the rear drive shaft and drive in 4HI and see if you still have the vibration.